Portable extractor machine
A vacuum extraction apparatus comprises a base having a first end and a second end, a tank assembly having a first end and a second end, a fluid pump operable to draw fluid from a first tank of the tank assembly and distribute the fluid to a fluid port, a heating unit operable to control a temperature of the fluid, and one or more vacuum units operable to decrease a pressure level within a second tank of the tank assembly. The second end of the tank assembly is rotatably coupled to the second end of the base, thereby providing access to an internal chamber of the base.
This application claims the benefit of priority of U.S. Provisional Application No. 61/557,164, filed on Nov. 8, 2011, under 35 U.S.C. § 119(e), which is hereby incorporated by reference in its entirety.
BACKGROUNDThe present patent application relates to carpet cleaning equipment, and, more particularly, to a portable vacuum extractor machine for cleaning carpets and other fabrics.
Cleaning carpet, upholstery, tile floors, and other surfaces enhances the appearance and extends the life of such surfaces by removing the soil embedded in the surface. Moreover, carpet cleaning removes allergens, such as mold, mildew, pollen, pet dander, dust mites, and bacteria. Indeed, regular cleaning keeps allergen levels low and thus contributes to an effective allergy avoidance program.
Vacuum extractors for cleaning surfaces, such as carpet, typically deposit a cleaning fluid upon the carpet or other surface to be cleaned. The deposited fluid, along with soil entrained in the fluid, is subsequently removed by high vacuum suction. This enables the carpet to be completely dry before mold has time to grow. The soiled fluid, i.e., waste fluid, is then separated from the working air and is collected in a recovery tank.
Due to the prevalence of carpeted surfaces in commercial establishments, institutions, and residences, there exists a thriving commercial carpet cleaning industry. In order to maximize the efficacy of the cleaning process, commercial vacuum extractors should be powerful to minimize the time in which the soil entrained cleaning fluid is present in the carpet. Commercial vacuum extractors should also be durable. That is, such a vacuum extractor should be manufactured from durable working parts so that the extractor has a long working life and requires little maintenance. Unfortunately, the cost of a high powered and durable machine can rise significantly if not designed cost effectively.
Individuals working in the carpet cleaning industry are subject to the undesirably loud noise produced by the vacuum motors of conventional vacuum extractors. In addition, some conventional vacuum extractors include fans mounted near internally housed pumps, vacuum motors, and pre-heaters. The fans function to expel air that has been heated by the internal mechanisms from the housing in which they are positioned. Unfortunately, the fans further contribute to the noise produced by conventional vacuum extractors. Fans also add expense and complexity, as well as increase power consumption.
Commercial extractors are often transported in a vehicle from one location to another. Consequently, ease of portability is an important consideration. Furthermore, because space is typically limited in the transport vehicle, minimizing the “footprint” of the extractor is also an important consideration. With regard to extractors that are stored in a janitor closet as opposed to a transport vehicle, minimizing the footprint remains an important consideration because closet space is generally limited in a commercial setting.
Additionally, conventional extractors generally include a single temperature setting for heating the cleaning fluid. However, it may be desirable to have at least a high temperature setting and a low temperature setting that may be selected depending upon the particular application. For example, the low temperature setting may be desirable for upholstery and other delicate fibers, while the high temperature setting may be desirable for synthetic carpets or the like.
Accordingly, what is needed is an apparatus for cleaning a surface that is cost effectively designed while being both high powered and durable. In addition, what is needed is a vacuum extractor in which the noise produced by the vacuum motors is sufficiently muffled.
OVERVIEWThis overview is intended to provide an overview of subject matter of the present patent application. It is not intended to provide an exclusive or exhaustive explanation of the invention. The detailed description is included to provide further information about the present patent application.
The present inventors have recognized, among other things, that use of a dual bi-metal thermostat in a portable extraction apparatus can provide a simple yet effective means for maintaining the temperature of a cleaning fluid within a desired range. The present inventors have also recognized that improved access to the components of a vacuum extraction apparatus can be provided by pivotally coupling a tank assembly about a bottom of a vacuum extraction apparatus base member. Further, improved cooling systems and muffler systems for a vacuum extraction apparatus have been discovered and are described herein.
In an example, a vacuum extraction apparatus is provided that includes a base having an upper end and a lower end vertically spaced from the upper end, a tank assembly coupled to the base and having an upper end and a lower end vertically spaced from the upper end, at least two transport wheels coupled to the lower end of the base, a fluid pump coupled to the base and operable to draw fluid from a first tank of the tank assembly and distribute the fluid to a fluid port, and one or more vacuum units coupled to the base and operable to decrease a pressure level within a second tank of the tank assembly. The vacuum extraction apparatus can be designed such that at least a portion of the fluid pump is vertically spaced from the one or more vacuum units within a base chamber when the vacuum extraction apparatus is in a generally vertical operational position. In an example, the vacuum extraction apparatus can further include a heating unit operable to elevate a temperature of the fluid, wherein the heating unit comprises one or more discrete temperature settings.
In an example, a vacuum extraction apparatus is provided that includes a base, a tank assembly coupled to the base, a fluid pump operable to draw fluid from a first tank of the tank assembly and distribute the fluid to a fluid port, a heating unit operable to elevate a temperature of the fluid, one or more vacuum units operable to decrease a pressure level within a second tank of the tank assembly, and an exhaust chamber positioned adjacent to a bottom side of the base and configured to receive exhaust air from the one or more vacuum units. The exhaust chamber can include a series of substantially parallel and substantially perpendicular walls defining a generally serpentine path for the exhaust air.
In an example, a vacuum extraction apparatus is provided that includes a base, a tank assembly coupled to the base and including a first tank and a second tank, a fluid pump operable to draw fluid from the first tank and distribute the fluid to a fluid port, a heating unit operable to heat the fluid to a selectable temperature, a vacuum system including a first vacuum unit and a second vacuum unit, and an exhaust chamber configured to receive exhaust air from the vacuum system. The heating unit can include at least a first thermostat device for substantially maintaining the fluid at a first temperature and a second thermostat device for substantially maintaining the fluid at a second temperature. The first and second vacuum units can be configured to be individually or simultaneously operated to provide at least two distinct pressure levels within the second tank.
In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. Like numerals having different letter suffixes may represent different instances of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed in the present document.
The present patent application relates to portable extractor machines for cleaning carpet, various fabrics, and other surfaces.
Referring to
The base 24 can include one or more caster-type front wheels 36 and larger rear wheels 38 for ease of maneuverability. However, the front wheels 36 can be omitted without departing from the intended scope of the present application. As discussed in further detail below, internal fluid delivery, heating, and extraction components can be housed in the base 24. A first electrical cord 40 and a second electrical cord 42 can extend into the base 24 to power the internal components. However, with reference to extractors having a smaller number of internal components, such as a single vacuum unit (as opposed to two vacuum units as will be described herein), only one electrical cord may be required. The base 24 can further include a fluid delivery port 44 from which a cleaning fluid 46, represented by an arrow in
The first tank 26 can be adapted to contain the cleaning fluid 46. Thus, the first tank 26 is hereinafter referred to as the clean fluid tank 26. The cleaning fluid 46 can be water or any suitable cleaning solution. The second tank 30 can include an inlet 48 to which a vacuum hose of the cleaning wand couples. The second tank 30 is configured to receive a mixture of soiled cleaning fluid and air, represented by an arrow 50, at the inlet 48. Thus, the second tank 30 is hereinafter referred to as the recovery tank 30. The recovery tank 30 can subsequently be emptied via a drain hose 52.
In an example, the base 24, the clean fluid tank 26, and the recovery tank 30 can be formed from a durable plastic material, such as polyethylene. An exemplary manufacturing method for the base 24, the clean fluid tank 26, and the recovery tank 30 is rotational molding. Rotational molding, also known as rotational casting, is a method for molding hollow plastic objects by placing finely divided particles in a hollow mold that is rotated about two axes, exposing it to heat and then to cold. A rotational molding technique and polyethylene can be a desirable combination due to their cost effectiveness. However, those skilled in the art will appreciate that other manufacturing methodologies, such as blow molding, can be employed. Further, numerous other materials can be used in place of polyethylene.
In an example, the clean fluid tank 26 can include a fill port 54 which can be used to fill the clean fluid tank 26 with the cleaning fluid 46. A control panel 56 can be positioned on a top portion of the base 24. The control panel 56 can include one or more switches, buttons, dials, gauges, or the like for operating the internal components located in the base 24. Exemplary switches, buttons, dials, or gauges of the control panel 56 can include a fluid pressure dial, vacuum motor switches, heating element switches, and the like. The base 24 can further include handles 58 that can be utilized by the operator to maneuver the apparatus 20. In an example, the handles 58 can be roller handles to assist with loading, unloading, and stair climbing.
With reference to
Optionally, the recovery tank 30 can include internally or externally molded rib members (not shown) generally encircling the recovery tank 30. Because the recovery tank 30 is sealed from the surrounding environment, it is subject to significant vacuum from the vacuum motors (discussed below) of the vacuum extraction apparatus 20. The inclusion of rib members can provide strength to the recovery tank 30 so as to avoid tank collapse when placed under a vacuum.
With reference again to
As further illustrated in
In an example, the cleaning fluid 46 can be delivered to the fluid delivery port 44 via the pump 80 and a series of hoses, including a first hose 88, a second hose 90, and a third hose 92.
The pressurized cleaning fluid 46 can then be routed towards the heating unit 84 in the direction indicated by arrow 91. An outlet of the second hose 90 can be coupled to an inlet 95 of the heating unit 84 with a suitable connection. The cleaning fluid 46 can then be passed through the heating unit 80 and heated to a desired temperature selected by the operator. Subsequently, the heated cleaning fluid 46 can be routed out of the heating unit 84 through an outlet 96 coupled to the third hose 92. The third hose 92 can be configured to carry the heated cleaning fluid 46 towards a top of the chamber 79 in the direction indicated by arrow 93, where it couples with the fluid delivery port 44 for distribution through the cleaning wand.
In operation, an outlet of the recovery tank 30 can be coupled to a first vacuum hose connection 100A in the base 24. Particularly,
Turning next to
In an example, the serpentine path 136 can be defined by a series of substantially parallel and perpendicular walls 134 representing a “squared-off” path design. However, “curved” path designs defined by a series of curved or rounded walls are also contemplated. In a further example, the intersections of the substantially parallel and perpendicular walls 134 can include curved or angled corners 138 configured to assist with flow through the exhaust chamber 130.
In an example, the control panel 56 can provide the option to select between two or more cleaning fluid temperatures, such as with a low temperature selection switch and a high temperature selection switch. With reference to
The heating unit 84 can use any suitable type of thermostat device. In an example, the first and second thermostat devices 142 and 144 can be bi-metal, snap-action type thermostats, with the first thermostat device 142 being configured to substantially maintain the cleaning fluid 46 at a first, lower temperature, and the second thermostat device 144 being configured to substantially maintain the cleaning fluid 46 at a second, higher temperature. Particularly, the temperature of the cleaning fluid 46 can be indirectly controlled based upon a temperature of the electric core 150. In an example, when the bi-metallic element of the first thermostat device 142 senses a predefined lower temperature set-point, the bi-metallic element snaps open such that the electrical circuit is broken and power is prevented from flowing through the electric core 150. When the electric core 150 cools down, the bi-metallic element once again snaps closed, thereby completing an electrical circuit and causing power to once again flow to the electric core 150 and heat the cleaning fluid 46. Consequently, the first thermostat device 142 can be configured to maintain the electric core 150, and thus the cleaning fluid 46, at a substantially constant temperature (or within a range of temperature values). The second thermostat device 144 can operate in a similar manner, but maintains the cleaning fluid 146 at a substantially constant higher temperature set-point. In an example, the first thermostat device 142 can be configured to maintain the cleaning fluid 46 at a temperature between about 150° F. and about 180° F., and the second thermostat device 144 can be configured to maintain the cleaning fluid 46 at a temperature between about 180° F. and about 230° F. However, numerous other temperatures are also contemplated and within the intended scope of the present application.
As appreciated by those skilled in the art, bi-metal thermostats can provide a simple yet effective means for selecting and maintaining the temperature of the cleaning fluid 46 at a desired level.
Although a heating unit 84 having two thermostat devices is described and illustrated herein, any heating unit having one or more temperature control means can be used with the vacuum extraction apparatus 20 in accordance with the present application. Further, although the heating unit 84 has been described with reference to the vacuum extraction apparatus 20, the heating unit 84 can be used in numerous other types of devices and heating applications that require the ability to set temperature at discrete levels as those skilled in the art will appreciate. Thus, the heating unit 84 of the present application is not limited to use with a vacuum extraction apparatus.
Further, although the vacuum extraction apparatus 20 has been described as including the heating unit 84, the heating unit 84 can also be omitted. In an example, heated cleaning fluid can be poured directly into the clean fluid tank 26 for distribution through the fluid port 44.
As shown in
The first and second vacuum units 82A and 82B and the heating unit 84 have been described as being controllable via separate buttons, switches, or the like merely for purposes of example and not limitation. In an example, a single switch, button, or the like can be configured to control both the “suction power” and the fluid temperature simultaneously, such as by energizing both the first and second vacuum units 82A and 82B and heating the cleaning fluid to a high temperature setpoint with a single selection by the operator. Further, in an example, actuation of another switch, button, or the like can result in only one of the first and second vacuum units 82A and 82B being energized, and the heating unit 84 set to a low temperature setpoint.
As shown in
Although the subject matter of the present patent application has been described with reference to various embodiments, workers skilled in the art will recognize that changes can be made in form and detail without departing from the scope of the application.
Claims
1. A vacuum extraction apparatus, comprising:
- a base having a front side, an opposing rear side, an upper end, and a lower end vertically spaced from the upper end of the base;
- a tank assembly having a front side, an opposing rear side, an upper end, and a lower end vertically spaced from the upper end of the tank assembly, the tank assembly including a first tank defining a first fluid volume and a second tank defining a second fluid volume, wherein the tank assembly is rotatably coupled to the lower end of the base such that the vacuum extraction apparatus is movable between a closed position wherein the front side of the base is in contact with the rear side of the tank assembly and an open position wherein the front side of the base is spaced apart from the rear side of the tank assembly;
- at least two transport wheels coupled to the lower end of the base;
- a fluid pump coupled to the base and operable to draw fluid from the first tank and distribute the fluid to a fluid port; and
- one or more vacuum units coupled to the base and operable to decrease a pressure level within the second tank;
- wherein at least a portion of the fluid pump is vertically spaced from the one or more vacuum units within a base chamber when the vacuum extraction apparatus is in a generally vertical operational position;
- wherein both the first tank and the second tank are positioned forward of the front side of the base when the vacuum extraction apparatus is in the generally vertical operational position; and
- wherein the first fluid volume of the first tank is positioned above the second fluid volume of the second tank when the vacuum extraction apparatus is in the generally vertical operational position.
2. The vacuum extraction apparatus of claim 1, wherein the first tank is a clean fluid tank and the second tank is a recovery tank.
3. The vacuum extraction apparatus of claim 1, further comprising a heating unit operable to elevate a temperature of the fluid, the heating unit including one or more discrete temperature settings.
4. The vacuum extraction apparatus of claim 3, wherein the heating unit includes one or more bi-metal thermostat devices.
5. The vacuum extraction apparatus of claim 4, wherein the one or more bi-metal thermostat devices includes a first bi-metal thermostat device for substantially maintaining the fluid at a first temperature and a second bi-metal thermostat device for substantially maintaining the fluid at a second temperature.
6. The vacuum extraction apparatus of claim 5, wherein the first temperature is between about 150° F. and about 180° F., and wherein the second temperature is between about 180° F. and about 230° F.
7. The vacuum extraction apparatus of claim 3, wherein the heating unit includes a coil wrapped around an electric core, the coil configured to allow passage of the fluid therethrough.
8. The vacuum extraction apparatus of claim 7, wherein the coil and the electric core are at least partially surrounded by an insulating material.
9. The vacuum extraction apparatus of claim 1, wherein the base includes an air intake, and wherein the air intake includes an air intake cover configured to provide an indirect path for ambient air into the air intake.
10. The vacuum extraction apparatus of claim 1, wherein the one or more vacuum units comprise a first vacuum unit and a second vacuum unit, the first and second vacuum units configured to be individually or simultaneously operated to provide at least two distinct pressure levels within the second tank.
11. The vacuum extraction apparatus of claim 1, further comprising a handle extending away from the rear side of the base and positioned near the upper end of the base.
12. A vacuum extraction apparatus, comprising:
- a base having a front side, an opposing rear side, a top side, a bottom side vertically spaced from the top side, and an interior defining a base chamber;
- a tank assembly pivotally coupled to the base with a hinge, the tank assembly including a first tank defining a first fluid volume and a second tank defining a second fluid volume;
- a fluid pump disposed within the base chamber and operable to draw fluid from the first tank and distribute the fluid to a fluid port;
- a heating unit disposed within the base chamber and operable to elevate a temperature of the fluid;
- one or more vacuum units disposed within the base chamber and operable to decrease a pressure level within the second tank, each of the one or more vacuum units including a vacuum motor intake extending from an air intake and providing a closed fluid path to the exterior of the vacuum extraction apparatus; and
- an exhaust chamber positioned adjacent to the bottom side of the base and including an exhaust chamber inlet and an exhaust chamber outlet, the exhaust chamber inlet in communication with the base such that during operation of the vacuum extraction apparatus, the exhaust chamber receives exhaust air from the one or more vacuum units and releases the exhaust air through the exhaust chamber outlet;
- wherein, when the vacuum extraction apparatus is in a generally vertical operational position:
- the first tank and the second tank are positioned forward of the front side of the base; and
- the first fluid volume of the first tank is positioned above the second fluid volume of the second tank.
13. The vacuum extraction apparatus of claim 12, wherein the exhaust chamber includes a series of chamber walls defining a generally serpentine path for the exhaust air.
14. The vacuum extraction apparatus of claim 13, wherein the series of chamber walls includes a series of substantially parallel and substantially perpendicular walls defining the generally serpentine path for the exhaust air.
15. The vacuum extraction apparatus of claim 14, wherein at least one adjacent pair of walls intersects to form a curved or angled corner.
16. The vacuum extraction apparatus of claim 13, wherein the series of chamber walls includes a series of curved walls defining the generally serpentine path for the exhaust air.
17. The vacuum extraction apparatus of claim 13, wherein the exhaust chamber is formed integral with the base.
18. The vacuum extraction apparatus of claim 17, wherein the exhaust chamber further includes an exhaust chamber cover configured to substantially enclose the chamber walls.
19. The vacuum extraction apparatus of claim 13, wherein the exhaust chamber outlet includes at least one curved wall configured to direct the exhaust air in a downward direction away from the base.
20. A vacuum extraction apparatus, comprising:
- a base having a front side, an opposing rear side, an upper end, and a lower end vertically spaced from the upper end of the base;
- a handle positioned near the upper end of the base and extending away from the rear side of the base;
- a tank assembly pivotally coupled to the lower end of the base such that the vacuum extraction apparatus is movable between a closed position wherein the front side of the base is in contact with a rear side of the tank assembly and an open position wherein the front side of the base is spaced apart from the rear side of the tank assembly, the tank assembly including a first tank defining a first fluid volume and a second tank defining a second fluid volume;
- a fluid pump operable to draw fluid from the first tank and distribute the fluid to a fluid port;
- a heating unit operable to heat the fluid to a selectable temperature, the heating unit including at least a first bi-metal thermostat device for substantially maintaining the fluid at a first temperature and a second bi-metal thermostat device for substantially maintaining the fluid at a second temperature;
- a vacuum system, including a first vacuum unit and a second vacuum unit, the first and second vacuum units configured to be individually or simultaneously operated to provide at least two distinct pressure levels within the second tank;
- an exhaust chamber positioned adjacent to a bottom side of the base and configured to receive exhaust air from the vacuum system;
- a first air intake spaced vertically above the exhaust chamber,
- a second air intake spaced vertically above the exhaust chamber;
- a first vacuum motor intake extending from the first air intake and providing a closed fluid path to the exterior of the vacuum extraction apparatus; and
- a second vacuum motor intake extending from the second air intake and providing a closed fluid path to the exterior of the vacuum extraction apparatus;
- wherein, when the vacuum extraction apparatus is in a generally vertical operational position:
- the first tank and the second tank are positioned forward of the front side of the base; and
- the first fluid volume of the first tank is positioned above the second fluid volume of the second tank.
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Type: Grant
Filed: Nov 8, 2012
Date of Patent: Oct 1, 2019
Patent Publication Number: 20130111697
Assignee: Hydramaster, LLC (Valrico, FL)
Inventors: Scott Betcher (Burnsville, MN), Mark Baxter (Coeur d' Alene, ID), Steve Williams (Hayden Lake, ID)
Primary Examiner: Joseph J Hail
Assistant Examiner: J Stephen Taylor
Application Number: 13/672,519
International Classification: A47L 11/34 (20060101); A47L 11/40 (20060101); A47L 9/00 (20060101);
